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MKVToolNix vs MediaInfo: catalog facts
MKVToolNix	MediaInfo
Free Free and open source under the GPL 2.0.	Free Free and open source under a BSD 2-clause licence.
Windows, macOS, Linux	Windows, macOS, Linux, Command line, iOS
Adds, removes and retags tracks without re-encoding anything Header editor for fixing default track flags and languages	Reports every codec, bitrate, track and tag in one readable panel Command-line tool as well as graphical versions, across every desktop platform
Matroska output only Cannot change the video or audio encoding at all	Reports only; it does not convert or fix anything The Windows installer has historically offered optional bundled software; choose carefully
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0	License: BSD-2-Clause
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 21, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.